Screen.



C. W. JACKSON SCREEN.

APPLICATION FILED APR. 21

PatentedMar. 27, 1917.

000000000 000 0000000 0 O Q O O O Z Z Z O O O 0 0 0 0 2 2 000 000000000 000 0 000 0 0 000 0000 UNITED AT S E ii.

OFFICE.

cnnntns vr. JACKSON, or cm'caeo, ILLINOIS.

SCREEN.

To allhvhom it may concern -Be it known that I, CHARLES W. JAoKsoN, a citizen ofi the'United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Screens, of which the following is a specification.

This invention relates to screens, and has for its object to provide a new and improved device of this description.

The invention is illustrated in the accompanying drawings, wherein= Figure 1' is a plan view of one form of screenembodying the invention;

- Fig. 2 is an enlarged sectional View taken on line 22 of Fig. 1;

Fig. 3 is an enlarged sectional view taken on line 33 of Fig. 1;

Fig. 4 is a plan view showing a modified construction Fig. 5 is a plan view showing a modified construction Fig. 6 is a sectional view taken on line 66 of Fig. 5;

Fig. 7 is a sectional view taken on 7-7 of Fig. 5;

Fig. 8 is a view showing a modified construction of the device shown in Fig.5;

F ig. 9 is a view, showing one form of cylindrical screen;

Fig. 10 is a sectional View taken on line line I 10-10 of Fig. 9;

Fig. 11 is a view showing a modified construction.

.Like numerals refer to like parts throughmetal'are usedfor this purpose it is found v that they become rough, due to the corrosive action of the material in the coal and to other causes, and thusbecome defective, deficient and ineificient.

I have found that all this difficulty canbe avoided by using a screen where the surface with which the coal comes in contact is made of silicious material, such, for example, as glass. This material is not corroded by the coal, and does not become roughened as does iron or metal. This material, however, is apt to be so brittle as to be incapable of sustaining the weight of the coal and the blows received therefrom. I prefer. therefore, to provide the silicious material at the point Where the coal makes contact, and to sup- Specification of Letters Batent. Patented Mar, 27 1917,

Application manna-21,1910. SerialNo. 556,839.

port material by supporting device or medium which will hold it in place and relieve it' of the strain due to the weight of the coal.

In Figs. 1,-2andc3 I; have shown one form of screen, consistingot one or more pieces, 1, of silicious material to act as the bottom of the screen, said material provided with a crease in diameter or cross sectional area from the top toward the bottom, so as to insure the free passage of the material. therethrough, and prevent them from being clogged. The screen may be provided with sides 5 made of silicious material, but these sides may be omitted if desired, because there is very little contact of the coal with the sides of the screen, and the contact at the sides does not retard the smooth flow of the coal over the screen. If the sides of silicious material are omitted, it is desirable to have sides, 6 of any suitable material so as to prevent the coal from passing off the screen at the sides.

In Fig. 4 there is shown a plan view of-a screen in which the silicious material 1 and the support 3 are free from holes, sothat the device acts simply as a chute.

'In Fig. 5 there is showna screen consisting of aseries of bars 9, separated by spaces.

10. These bars are made of silicious mate r1al, such as glass or the like, and are carried by supports 11 of metal or other material of suitable strength' The supports 11 are provided with lugs 12, through which pass the rods '13, by means of which the screen is held in position. The screens are heldin proper relation by the sleeves 14 on the rods 13. This screen is preferably provided with sides 6 of any suitable material.

In Fig. 8 there is a modified construction shown in'which the bars 9 are circular and I the supports 11 are of a proper shape to receive them. I

In Fig. 9 there is illustrated a cylindrical, hollow screen. The interior of the screen is made up of silicious material 1, such as glass, made in sections of any desired size,

and the support for the glass is on the outside and may be in the form of a cylinder 15. The support and the silicious material are provided with holes through which the fine coal may pass, and the cylinder is inclined so that the large lumps will pass through and be discharged at the discharge end; This cylinder may be provided with holes increasing in cross sectional area from the upper end toward the lower end, and is mounted to rotate about an axis, as by means of the shafts 16 and 17. Instead of being round, the screen may be polygonal, as

chute or screen when the angleof inclination is comparatively small, and that it will not be stopped and the screen clogged, as is the case with the screens now in use. The support being of a tenacious material which is not brittle, holds the silicious material. in proper place and prevents it from being broken and relieves it of the strain which would tend to break it. It will also be seen that even in case the silicious material would become' cracked it would still be held in place and would act eiliciently and satisfactorily. The device is adapted to be used for conveyingany kind of material, such as coal, ashes, grain, coke or the l1ke. When this device is used the chute or screen will be ef- I fcctive with a much less incline than with the ordinary screen or chute, and hence it reduces the cost of construction and saves material in building. It also decreases the velocity of the material and hence greatly reduces the breakage in material such as coal and the like. The shape of the chute or screen may be varied as desired, and the device may be used in connection with any other suitable apparatus.

I claim:

1.'A screen for coal, etc., comprising an inclined portion made of silicious material with which the coal makes direct contact and provided with a series of openings extending therethrocgh, and an inclined supporting part therefor of tenacious material fixed withrelation to saidsilicious material adapted to relieve the strain on the silicious material and hold it in place, said tenacious material also provided with openings which register with the openings in the silicious material.

2. A screen for coal, etc. comprising an inclined engaging piece of silicious material,

aseries of holes therein larger in cross sec-.

material, said supporting piece provided with ho'lesregistering with those in said en gaging piece. 4

3. A screen comprising a screening surface made up of SlllClOuS material and having screen openings, and supporting means for said silicious material consisting of a tenacious material, said tenacious material having screen openings registering with those of the silicious material.

4. A screen comprising a screening surface made up of silicious material and with elongated screen openings between portions of said silicious material, and a supporting device supporting said silicious material between said elongated openings, the silicious material provided with projecting parts which project into'receiving spaces in the supporting device, the supporting device and siliciou's material being fixed with relation to each other.

5. A screen for coal, etc. comprising a screening surface made up of silicious material, said surface broken up by a series of openings or spaces throughv which the finer material passes, rigid metallic supporting material located belowthe silicious material and upon whiclf it is supported, said supporting material provided with openings or spaces registering with the openings or spaces which break up said silicious material screening surface, the width of said openings or spaces between saidrigid metallic supporting material at their narrowest portions being wider than the narrowest portions of the openings or spaces associated with the silicious material.

Signed at Chicago, Illinois, this 11th day of April, 1910. CHARLES W. JACKSON.

Witnesses:

EDNA K. REYNOLDS, DONALD M. CARTER. 

